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J. Cent. South Univ. (2017) 24: 2049-2057 DOI: https://doi.org/10.1007/s11771-017-3614-6 Permutation-substitution image encryption scheme based on a modified chaotic map in transform domain Ramadan.... Fractional Fourier Transform (FRFT) is used before the encryption scheme to get a large degree of randomization. The permutation is achieved by Baker map and the substitution by a key-related-to-plain......
包变换; 粗糙度; AIEM; two-scale; microwave scattering model; wavelet packet transform; roughness; AI-EM; [全文内容正在添加中] ......
with the elitism and the immune algorithm with the information entropy and elitism by multi-experiments. Key words: image characteristic; template match; adaptive template filter; wavelet transform; elitist... of an image g(i, j) is sn. Applying the multi-layer orthogonal wavelet transform to image g(i, j), a group of coefficients of wavelet decomposition Wg(s, j) will be generated, Wg(1, j)?{LHj}, Wg(2, j)?......
not be estimated accurately, and the de-noising performance of this method is superior to that of a single Kalman filter. Key words: Kalman filter; multi-scale; wavelet transform; Haar algorithm; denoise 卡尔曼... Input signal are used to calculate approximation coefficient c at t time step in wavelet transform 图4所示为基于无抽取Haar算法的实时多尺度卡尔曼滤波算法(Real time multiscale Kalman filter,RMKF)结构图.该算法的处理步骤如下(输入为t时刻采样数......
data compression using wavelet transform methods[J]. IEEE Transactions on Power Delivery, 1997, 12(3): 1250-1257. [7] 何正友, 钱清泉, 刘志刚. 一种基于优化小波基的电力系统故障暂态数据压缩方法[J]. 中国电机工程学报, 2002, 22(6): 1-5. HE...): 34-37. GUO Binbin, HUANG Chun. Power quality disturbance data compression based on wavelet packet transform[J]. Electric Power Automation Equipment, 2005, 25(11): 34-37. [11] 胡晓新, 王岩飞. 基于小波包变换的SAR原始数据......
of time-varying structure based on discrete wavelet transform was presented. A time-varying parameter was expended on multi-scale as approximate and detail signal by discrete wavelet basis. By ignoring..., the identified result of time-varying damping is very sensitive to noise. Key words: discrete wavelet transform; time-varying structure; parameter identification; multi-scale analysis; least square method (LSM......
; 文献标志码:A 文章编号:1672-7207(2011)02-0404-05 Application of wavelet transform and subsampling in color image..., a novel color-image watermarking algorithm was proposed based on wavelet transform and subsampling. The watermark was scrambled by 2-D Arnold cat map, and the scrambled watermark was embedded......
A continuous differentiable wavelet threshold function for speech enhancementJIA Hai-rong(贾海蓉), ZHANG Xue-ying(张雪英), BAI Jing(白静)(College of Information and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)Abstract:Enhanced speech based on the traditional wavelet threshold function had auditory oscillation distortion and the low signal-to-noise ratio (SNR). In order to solve......
microarrays using wavelet analysis[J]. Journal of Biomedical Informatics, 2006, 39(4): 379-388. [18] Amin A, Fischer S. A document skew detection method using the Hough transform[J]. Pattern Analysis &...: Considering the contradiction between analysis precision and analysis speed of the now-being image incline correction methods, novel algorithms based on modified Hough transform and Radon transform were......